Hi Mark,
This feature displays activity logs for assets on the timeline. If you perform any of the following asset-related operations in Adobe Experience Manager Assets, the activity stream feature updates the timeline to reflect the activity.
Validate below 2 line items -
1.
Activity stream feature updates the timeline information to reflect the activities performed on the assets.
You should validate /var/audit/com.day.cq.dam/content/dam/custom-folder/abc.jpg path, activity information in timeline are fetched from the same path.
2.
You should validate Adobe CQ DAM Event audit listener as well and make sure it is in enabled state.
